Mages are the designated spellcasters of the Nexus community. They're duties are encapsulated in strengthening attack and defense in allies and decreasing attack and defense in enemies. Soloing for mages is often tedious and thus many mages, even at low levels, are encouraged to fight alongside stronger fighters. Thus, aiding the group and earning massive amounts of experience.
Mages also require the most experience to reach 99, thus hunting with stronger players is encouraged.